Rust Belt, Sun Belt, Bible Belt, etc. - Which "Belt" Came First?

[PoppaSan]

Too late to ETA:

@HeyHomie

When did the term “belt” to describe the characteristic of a region in the US first come into use, and what was the first one?

My WAG is “Bible Belt,” for no reason at all.

" The “belt” terminology was first applied to growing regions for various crops, "